/******************************************************************************
 * Copyright (c) 2009-2022, Barthelemy Dagenais and individual contributors.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * - The name of the author may not be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package py4j.commands;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.util.logging.Logger;

import py4j.Protocol;
import py4j.Py4JException;
import py4j.ReturnObject;

public class ExceptionCommand extends AbstractCommand {

	private final Logger logger = Logger.getLogger(ExceptionCommand.class.getName());

	public final static String EXCEPTION_COMMAND_NAME = "p";

	public ExceptionCommand() {
		super();
		this.commandName = EXCEPTION_COMMAND_NAME;
	}

	@Override
	public void execute(String commandName, BufferedReader reader, BufferedWriter writer)
			throws Py4JException, IOException {
		String returnCommand = null;
		Throwable exception = (Throwable) Protocol.getObject(reader.readLine(), this.gateway);
		// EOQ
		reader.readLine();

		String stackTrace = Protocol.getThrowableAsString(exception);
		ReturnObject rObject = ReturnObject.getPrimitiveReturnObject(stackTrace);
		returnCommand = Protocol.getOutputCommand(rObject);

		logger.finest("Returning command: " + returnCommand);
		writer.write(returnCommand);
		writer.flush();
	}

}
